feat(config): json schema

Cargo.toml

@@ -17,6 +17,10 @@ categories = ["command-line-utilities", "development-tools"]
 
 [workspace.dependencies]
 autoi18n-config = { version = "0.0.0", path = "./packages/autoi18n-config" }
+schemars = "0.8.21"
+serde = { version = "1.0.209", features = ["derive"] }
+serde_json = "1.0.128"
+tempfile = "3.12.0"
 
 # Config for 'cargo dist'
 [workspace.metadata.dist]

packages/autoi18n-config/Cargo.toml

@@ -12,6 +12,14 @@ homepage.workspace = true
 readme.workspace = true
 categories.workspace = true
 
+[features]
+default = []
+json-schema = ["dep:schemars"]
+
 [dependencies]
-serde = { version = "1.0.209", features = ["derive"] }
-serde_json = "1.0.128"
+schemars = { workspace = true, optional = true }
+serde = { workspace = true }
+serde_json = { workspace = true }
+
+[dev-dependencies]
+tempfile = { workspace = true }

packages/autoi18n-config/src/lib.rs

@@ -2,7 +2,9 @@ use error::ConfigError;
 
 pub mod error;
 
-#[derive(serde::Serialize, serde::Deserialize)]
+#[derive(serde::Serialize, serde::Deserialize, Default)]
+#[cfg_attr(feature = "json-schema", derive(schemars::JsonSchema))]
+#[cfg_attr(test, derive(Debug, PartialEq, Eq))]
 pub struct CliConfig {
     #[serde(rename = "$schema", default = "CliConfig::default_schema_location")]
     pub schema: String,
@@ -23,7 +25,38 @@ impl CliConfig {
         let package_version = env!("CARGO_PKG_VERSION");
 
         format!(
-        "https://raw.githubusercontent.com/autoi18n/cli/main/schemas/v{package_version}/autoi18n.schema.json"
-    )
+            "https://raw.githubusercontent.com/autoi18n/cli/main/schemas/v{package_version}/autoi18n.schema.json"
+        )
+    }
+}
+
+#[cfg(test)]
+mod test_config {
+
+    use crate::CliConfig;
+
+    #[test]
+    fn config_should_be_serializable() {
+        let config = CliConfig::default();
+
+        let json = serde_json::to_string_pretty(&config).expect("it to be serializable");
+
+        let file = tempfile::Builder::new()
+            .suffix(".json")
+            .tempfile()
+            .expect("it to create file");
+
+        std::fs::write(file.path(), json).expect("it to write to file");
+
+        let loaded = CliConfig::load(file.path()).expect("it to be parsed");
+
+        assert_eq!(config, loaded);
+    }
+
+    #[test]
+    #[cfg(feature = "json-schema")]
+    fn json_schema_should_be_serializable() {
+        serde_json::to_string_pretty(&schemars::schema_for!(CliConfig))
+            .expect("it to be serializable");
     }
 }